/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 - present Instructure, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

const esbuild = require('esbuild')
const path = require('path')
const { promisify } = require('util')
const { exec } = require('child_process')
const fsp = require('fs/promises')
const execAsync = promisify(exec)

const esBuild = async (entryPoint, sha) => {
  const outFile = `./.tmp/${sha}_size_bundle.js`
  const result = await esbuild.build({
    entryPoints: [entryPoint],
    bundle: true,
    outfile: outFile,
    metafile: true,
    external: ['fs', 'path', 'os', 'module'],
    treeShaking: true
  })

  const analysis = await esbuild.analyzeMetafile(result.metafile)

  return { bundle: result, outFile, analysis }
}
const gzip = async (fileName) => {
  const file = path.resolve(fileName)
  await execAsync(`gzip ${file}`)

  const stats = await fsp.stat(path.resolve(`${file}.gz`))

  return stats
}

module.exports = {
  esBuild,
  gzip
}
